tests: Remove CONFIG_DRIVER_TEST=y from example config

This was still present in hostapd example configuration even though the
test driver wrapper is not used anywhere in the hwsim testing and there
are no plans of using it either.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/example-hostapd.config

@@ -1,6 +1,5 @@
 #CC=ccache gcc
 
-CONFIG_DRIVER_TEST=y
 CONFIG_DRIVER_NONE=y
 CONFIG_DRIVER_NL80211=y
 CONFIG_RSN_PREAUTH=y